/*!
 * Nestable jQuery Plugin - Copyright (c) 2012 David Bushell - http://dbushell.com/
 * Dual-licensed under the BSD or MIT licenses
 */
;(function($, window, document, undefined)
{
    var hasTouch = 'ontouchstart' in document;

    /**
     * Detect CSS pointer-events property
     * events are normally disabled on the dragging element to avoid conflicts
     * https://github.com/ausi/Feature-detection-technique-for-pointer-events/blob/master/modernizr-pointerevents.js
     */
    var hasPointerEvents = (function()
    {
        var el    = document.createElement('div'),
            docEl = document.documentElement;
        if (!('pointerEvents' in el.style)) {
            return false;
        }
        el.style.pointerEvents = 'auto';
        el.style.pointerEvents = 'x';
        docEl.appendChild(el);
        var supports = window.getComputedStyle && window.getComputedStyle(el, '').pointerEvents === 'auto';
        docEl.removeChild(el);
        return !!supports;
    })();

    var defaults = {
        listNodeName    : 'ol',
        itemNodeName    : 'li',
        rootClass       : 'dd',
        listClass       : 'dd-list',
        itemClass       : 'dd-item',
        dragClass       : 'dd-dragel',
        handleClass     : 'dd-handle',
        collapsedClass  : 'dd-collapsed',
        placeClass      : 'dd-placeholder',
        noDragClass     : 'dd-nodrag',
        emptyClass      : 'dd-empty',
        expandBtnHTML   : '<button data-action="expand" type="button">Expand</button>',
        collapseBtnHTML : '<button data-action="collapse" type="button">Collapse</button>',
        group           : 0,
        maxDepth        : 5,
        threshold       : 20
    };

    function Plugin(element, options)
    {
        this.w  = $(document);
        this.el = $(element);
        this.options = $.extend({}, defaults, options);
        this.init();
    }

    Plugin.prototype = {

        init: function()
        {
            var list = this;

            list.reset();

            list.el.data('nestable-group', this.options.group);

            list.placeEl = $('<div class="' + list.options.placeClass + '"/>');

            $.each(this.el.find(list.options.itemNodeName), function(k, el) {
                list.setParent($(el));
            });

            list.el.on('click', 'button', function(e) {
                if (list.dragEl) {
                    return;
                }
                var target = $(e.currentTarget),
                    action = target.data('action'),
                    item   = target.parent(list.options.itemNodeName);
                if (action === 'collapse') {
                    list.collapseItem(item);
                }
                if (action === 'expand') {
                    list.expandItem(item);
                }
            });

            var onStartEvent = function(e)
            {
                var handle = $(e.target);
                if (!handle.hasClass(list.options.handleClass)) {
                    if (handle.closest('.' + list.options.noDragClass).length) {
                        return;
                    }
                    handle = handle.closest('.' + list.options.handleClass);
                }

                if (!handle.length || list.dragEl) {
                    return;
                }

                list.isTouch = /^touch/.test(e.type);
                if (list.isTouch && e.touches.length !== 1) {
                    return;
                }

                e.preventDefault();
                //list.dragStart(e.touches ? e.touches[0] : e);
            };

            var onMoveEvent = function(e)
            {
                if (list.dragEl) {
                    e.preventDefault();
                    list.dragMove(e.touches ? e.touches[0] : e);
                }
            };

            var onEndEvent = function(e)
            {
                if (list.dragEl) {
                    e.preventDefault();
                    list.dragStop(e.touches ? e.touches[0] : e);
                }
            };

            if (hasTouch) {
                list.el[0].addEventListener('touchstart', onStartEvent, false);
                window.addEventListener('touchmove', onMoveEvent, false);
                window.addEventListener('touchend', onEndEvent, false);
                window.addEventListener('touchcancel', onEndEvent, false);
            }

            list.el.on('mousedown', onStartEvent);
            list.w.on('mousemove', onMoveEvent);
            list.w.on('mouseup', onEndEvent);

        },

        serialize: function()
        {
            var data,
                depth = 0,
                list  = this;
            step  = function(level, depth)
            {
                var array = [ ],
                    items = level.children(list.options.itemNodeName);
                items.each(function()
                {
                    var li   = $(this),
                        item = $.extend({}, li.data()),
                        sub  = li.children(list.options.listNodeName);
                    if (sub.length) {
                        item.children = step(sub, depth + 1);
                    }
                    array.push(item);
                });
                return array;
            };
            data = step(list.el.find(list.options.listNodeName).first(), depth);
            return data;
        },

        serialise: function()
        {
            return this.serialize();
        },

        reset: function()
        {
            this.mouse = {
                offsetX   : 0,
                offsetY   : 0,
                startX    : 0,
                startY    : 0,
                lastX     : 0,
                lastY     : 0,
                nowX      : 0,
                nowY      : 0,
                distX     : 0,
                distY     : 0,
                dirAx     : 0,
                dirX      : 0,
                dirY      : 0,
                lastDirX  : 0,
                lastDirY  : 0,
                distAxX   : 0,
                distAxY   : 0
            };
            this.isTouch    = false;
            this.moving     = false;
            this.dragEl     = null;
            this.dragRootEl = null;
            this.dragDepth  = 0;
            this.hasNewRoot = false;
            this.pointEl    = null;
        },

        //expandItem: function(li)
        //{
        //    li.removeClass(this.options.collapsedClass);
        //    li.children('[data-action="expand"]').hide();
        //    /*li.children('[data-action="collapse"]').show();*/
        //    li.children('[data-action="collapse"]').attr('style','display:block;background-image:url("/static/proxyimages/xiangshang.png");');
        //    li.children(this.options.listNodeName).show();
        //    if(getCookie("tree") != null){
        //        var CookieValue = getCookie("tree") + li.attr('data-id') + ",";
        //    }
        //    else{
        //        var CookieValue = li.attr('data-id') + ",";
        //    }
        //    $.cookie("tree", CookieValue, {expires:3600, path:'/administrator/'});
        //},
        //
        //collapseItem: function(li, a)
        //{
        //    var lists = li.children(this.options.listNodeName);
        //    if (lists.length) {
        //        li.addClass(this.options.collapsedClass);
        //        li.children('[data-action="collapse"]').hide();
        //        /*li.children('[data-action="expand"]').show();*/
        //        li.children('[data-action="expand"]').attr('style','display:block;background-image:url("/static/proxyimages/xiangxia.png");');
        //        li.children(this.options.listNodeName).hide();
        //        if(getCookie("tree") != null){
        //            var CookieValueArray = getCookie("tree").split(",");
        //            for(i=0;i<CookieValueArray.length;i++){
        //                if(CookieValueArray[i] == li.attr('data-id') && a == true){
        //                    li.children('[data-action="expand"]').hide();
        //                    li.children('[data-action="collapse"]').show();
        //                    li.children(this.options.listNodeName).show();
        //                }
        //            }
        //            if(a != true){
        //                var CookieValue = "";
        //                for(i=0;i<CookieValueArray.length-1;i++){
        //                    if(CookieValueArray[i] != li.attr('data-id')){
        //                        CookieValue += CookieValueArray[i] + ",";
        //                    }
        //                }
        //                if(CookieValue == ""){
        //                    $.cookie("tree", "", {expires:-1, path:'/administrator/'});
        //                }
        //                else{
        //                    $.cookie("tree", CookieValue, {expires:3600, path:'/administrator/'});
        //                }
        //            }
        //        }
        //    }
        //},

        expandItem: function(li)
        {
            li.removeClass(this.options.collapsedClass);
            li.children('[data-action="expand"]').hide();
            /*li.children('[data-action="collapse"]').show();*/
			li.children('[data-action="collapse"]').attr('style','display:block;background-image:url("/static/proxyimages/xiangshang.png");');
            li.children(this.options.listNodeName).show();
        },

        collapseItem: function(li)
        {
            var lists = li.children(this.options.listNodeName);
            if (lists.length) {
                li.addClass(this.options.collapsedClass);
                li.children('[data-action="collapse"]').hide();
                /*li.children('[data-action="expand"]').show();*/
				li.children('[data-action="expand"]').attr('style','display:block;background-image:url("/static/proxyimages/xiangxia.png");');
                li.children(this.options.listNodeName).hide();
            }
        },

        expandAll: function()
        {
            var list = this;
            list.el.find(list.options.itemNodeName).each(function() {
                list.expandItem($(this));
            });
        },

        collapseAll: function()
        {
            var list = this;
            list.el.find(list.options.itemNodeName).each(function() {
                list.collapseItem($(this));
            });
        },

        setParent: function(li)
        {
            if (li.children(this.options.listNodeName).length) {
                li.prepend($(this.options.expandBtnHTML));
                li.prepend($(this.options.collapseBtnHTML));
            }
            li.children('[data-action="expand"]').hide();
        },

        unsetParent: function(li)
        {
            li.removeClass(this.options.collapsedClass);
            li.children('[data-action]').remove();
            li.children(this.options.listNodeName).remove();
        },

        //dragStart: function(e)
        //{
        //    var mouse    = this.mouse,
        //        target   = $(e.target),
        //        dragItem = target.closest(this.options.itemNodeName);
        //
        //    this.placeEl.css('height', dragItem.height());
        //
        //    mouse.offsetX = e.offsetX !== undefined ? e.offsetX : e.pageX - target.offset().left;
        //    mouse.offsetY = e.offsetY !== undefined ? e.offsetY : e.pageY - target.offset().top;
        //    mouse.startX = mouse.lastX = e.pageX;
        //    mouse.startY = mouse.lastY = e.pageY;
        //
        //    this.dragRootEl = this.el;
        //
        //    this.dragEl = $(document.createElement(this.options.listNodeName)).addClass(this.options.listClass + ' ' + this.options.dragClass);
        //    this.dragEl.css('width', dragItem.width());
        //
        //    dragItem.after(this.placeEl);
        //    dragItem[0].parentNode.removeChild(dragItem[0]);
        //    dragItem.appendTo(this.dragEl);
        //
        //    $(document.body).append(this.dragEl);
        //    this.dragEl.css({
        //        'left' : e.pageX - mouse.offsetX,
        //        'top'  : e.pageY - mouse.offsetY
        //    });
        //    // total depth of dragging item
        //    var i, depth,
        //        items = this.dragEl.find(this.options.itemNodeName);
        //    for (i = 0; i < items.length; i++) {
        //        depth = $(items[i]).parents(this.options.listNodeName).length;
        //        if (depth > this.dragDepth) {
        //            this.dragDepth = depth;
        //        }
        //    }
        //},
        //
        //dragStop: function(e)
        //{
        //    var el = this.dragEl.children(this.options.itemNodeName).first();
        //    el[0].parentNode.removeChild(el[0]);
        //    this.placeEl.replaceWith(el);
        //
        //    this.dragEl.remove();
        //    this.el.trigger('change');
        //    if (this.hasNewRoot) {
        //        this.dragRootEl.trigger('change');
        //    }
        //    this.reset();
        //},

        //dragMove: function(e)
        //{
        //    var list, parent, prev, next, depth,1
        //        opt   = this.options,
        //        mouse = this.mouse;
        //
        //    this.dragEl.css({
        //        'left' : e.pageX - mouse.offsetX,
        //        'top'  : e.pageY - mouse.offsetY
        //    });
        //
        //    // mouse position last events
        //    mouse.lastX = mouse.nowX;
        //    mouse.lastY = mouse.nowY;
        //    // mouse position this events
        //    mouse.nowX  = e.pageX;
        //    mouse.nowY  = e.pageY;
        //    // distance mouse moved between events
        //    mouse.distX = mouse.nowX - mouse.lastX;
        //    mouse.distY = mouse.nowY - mouse.lastY;
        //    // direction mouse was moving
        //    mouse.lastDirX = mouse.dirX;
        //    mouse.lastDirY = mouse.dirY;
        //    // direction mouse is now moving (on both axis)
        //    mouse.dirX = mouse.distX === 0 ? 0 : mouse.distX > 0 ? 1 : -1;
        //    mouse.dirY = mouse.distY === 0 ? 0 : mouse.distY > 0 ? 1 : -1;
        //    // axis mouse is now moving on
        //    var newAx   = Math.abs(mouse.distX) > Math.abs(mouse.distY) ? 1 : 0;
        //
        //    // do nothing on first move
        //    if (!mouse.moving) {
        //        mouse.dirAx  = newAx;
        //        mouse.moving = true;
        //        return;
        //    }
        //
        //    // calc distance moved on this axis (and direction)
        //    if (mouse.dirAx !== newAx) {
        //        mouse.distAxX = 0;
        //        mouse.distAxY = 0;
        //    } else {
        //        mouse.distAxX += Math.abs(mouse.distX);
        //        if (mouse.dirX !== 0 && mouse.dirX !== mouse.lastDirX) {
        //            mouse.distAxX = 0;
        //        }
        //        mouse.distAxY += Math.abs(mouse.distY);
        //        if (mouse.dirY !== 0 && mouse.dirY !== mouse.lastDirY) {
        //            mouse.distAxY = 0;
        //        }
        //    }
        //    mouse.dirAx = newAx;
        //
        //    /**
        //     * move horizontal
        //     */
        //    if (mouse.dirAx && mouse.distAxX >= opt.threshold) {
        //        // reset move distance on x-axis for new phase
        //        mouse.distAxX = 0;
        //        prev = this.placeEl.prev(opt.itemNodeName);
        //        // increase horizontal level if previous sibling exists and is not collapsed
        //        if (mouse.distX > 0 && prev.length && !prev.hasClass(opt.collapsedClass)) {
        //            // cannot increase level when item above is collapsed
        //            list = prev.find(opt.listNodeName).last();
        //            // check if depth limit has reached
        //            depth = this.placeEl.parents(opt.listNodeName).length;
        //            if (depth + this.dragDepth <= opt.maxDepth) {
        //                // create new sub-level if one doesn't exist
        //                if (!list.length) {
        //                    list = $('<' + opt.listNodeName + '/>').addClass(opt.listClass);
        //                    list.append(this.placeEl);
        //                    prev.append(list);
        //                    this.setParent(prev);
        //                } else {
        //                    // else append to next level up
        //                    list = prev.children(opt.listNodeName).last();
        //                    list.append(this.placeEl);
        //                }
        //            }
        //        }
        //        // decrease horizontal level
        //        if (mouse.distX < 0) {
        //            // we can't decrease a level if an item preceeds the current one
        //            next = this.placeEl.next(opt.itemNodeName);
        //            if (!next.length) {
        //                parent = this.placeEl.parent();
        //                this.placeEl.closest(opt.itemNodeName).after(this.placeEl);
        //                if (!parent.children().length) {
        //                    this.unsetParent(parent.parent());
        //                }
        //            }
        //        }
        //    }
        //
        //    var isEmpty = false;
        //
        //    // find list item under cursor
        //    if (!hasPointerEvents) {
        //        this.dragEl[0].style.visibility = 'hidden';
        //    }
        //    this.pointEl = $(document.elementFromPoint(e.pageX - document.body.scrollLeft, e.pageY - (window.pageYOffset || document.documentElement.scrollTop)));
        //    if (!hasPointerEvents) {
        //        this.dragEl[0].style.visibility = 'visible';
        //    }
        //    if (this.pointEl.hasClass(opt.handleClass)) {
        //        this.pointEl = this.pointEl.parent(opt.itemNodeName);
        //    }
        //    if (this.pointEl.hasClass(opt.emptyClass)) {
        //        isEmpty = true;
        //    }
        //    else if (!this.pointEl.length || !this.pointEl.hasClass(opt.itemClass)) {
        //        return;
        //    }
        //
        //    // find parent list of item under cursor
        //    var pointElRoot = this.pointEl.closest('.' + opt.rootClass),
        //        isNewRoot   = this.dragRootEl.data('nestable-id') !== pointElRoot.data('nestable-id');
        //
        //    /**
        //     * move vertical
        //     */
        //    if (!mouse.dirAx || isNewRoot || isEmpty) {
        //        // check if groups match if dragging over new root
        //        if (isNewRoot && opt.group !== pointElRoot.data('nestable-group')) {
        //            return;
        //        }
        //        // check depth limit
        //        depth = this.dragDepth - 1 + this.pointEl.parents(opt.listNodeName).length;
        //        if (depth > opt.maxDepth) {
        //            return;
        //        }
        //        var before = e.pageY < (this.pointEl.offset().top + this.pointEl.height() / 2);
        //        parent = this.placeEl.parent();
        //        // if empty create new list to replace empty placeholder
        //        if (isEmpty) {
        //            list = $(document.createElement(opt.listNodeName)).addClass(opt.listClass);
        //            list.append(this.placeEl);
        //            this.pointEl.replaceWith(list);
        //        }
        //        else if (before) {
        //            this.pointEl.before(this.placeEl);
        //        }
        //        else {
        //            this.pointEl.after(this.placeEl);
        //        }
        //        if (!parent.children().length) {
        //            this.unsetParent(parent.parent());
        //        }
        //        if (!this.dragRootEl.find(opt.itemNodeName).length) {
        //            this.dragRootEl.append('<div class="' + opt.emptyClass + '"/>');
        //        }
        //        // parent root list has changed
        //        if (isNewRoot) {
        //            this.dragRootEl = pointElRoot;
        //            this.hasNewRoot = this.el[0] !== this.dragRootEl[0];
        //        }
        //    }
        //}

    };

    $.fn.nestable = function(params)
    {
        var lists  = this,
            retval = this;

        lists.each(function()
        {
            var plugin = $(this).data("nestable");

            if (!plugin) {
                $(this).data("nestable", new Plugin(this, params));
                $(this).data("nestable-id", new Date().getTime());
            } else {
                if (typeof params === 'string' && typeof plugin[params] === 'function') {
                    retval = plugin[params]();
                }
            }
        });

        return retval || lists;
    };

})(window.jQuery || window.Zepto, window, document);
